--- twinkle-1.4.2/configure.in.org	2012-11-25 13:35:52.700436829 +0100
+++ twinkle-1.4.2/configure.in	2012-11-25 13:36:12.737587289 +0100
@@ -247,15 +247,18 @@
 # iLBC
 if test "x$ac_cv_ilbc" = "xyes"
 then
-	AC_CHECK_LIB(ilbc, iLBC_decode, [
-		AC_CHECK_HEADER(ilbc/iLBC_define.h, [],
-			[AC_MSG_ERROR([ilbc header files missing])])
+	saved_LIBS="$LIBS"
+	LIBS="$LIBS -lilbc"
+	AC_LINK_IFELSE([
+		     #include <stdio.h>
+		     #include <ilbc.h>
+		     int main() { iLBC_decode(NULL, NULL, NULL, 0); return 0; } ], [
 		AC_DEFINE(HAVE_ILBC, 1, [Define to 1 if you have the <ilbc> library.])
 		LIBS="-lilbc $LIBS"
 		echo "LIBS += -lilbc" >> $QT_INCL_PRO
 		have_ilbc="yes"
 		], [have_ilbc="no"])
-		
+	LIBS="$saved_LIBS"
 	if test "x$ac_cv_ilbc_cpp" = "xyes"
 	then
 		AC_DEFINE(HAVE_ILBC_CPP, 1, [Define to 1 if you have a C++ ilbc library.])
--- twinkle-1.4.2/src/audio/audio_encoder.h~	2012-11-25 13:36:19.687755088 +0100
+++ twinkle-1.4.2/src/audio/audio_encoder.h	2012-11-25 13:37:58.863482959 +0100
@@ -39,7 +39,7 @@
 #ifndef HAVE_ILBC_CPP
 extern "C" {
 #endif
-#include <ilbc/iLBC_define.h>
+#include <ilbc.h>
 #ifndef HAVE_ILBC_CPP
 }
 #endif
--- twinkle-1.4.2/src/audio/audio_decoder.h~	2012-11-25 13:36:19.687755088 +0100
+++ twinkle-1.4.2/src/audio/audio_decoder.h	2012-11-25 13:38:12.730484432 +0100
@@ -40,7 +40,7 @@
 #ifndef HAVE_ILBC_CPP
 extern "C" {
 #endif
-#include <ilbc/iLBC_define.h>
+#include <ilbc.h>
 #ifndef HAVE_ILBC_CPP
 }
 #endif
--- twinkle-1.4.2/src/audio/audio_encoder.cpp~	2009-01-18 15:13:46.000000000 +0100
+++ twinkle-1.4.2/src/audio/audio_encoder.cpp	2012-11-25 13:39:31.529053658 +0100
@@ -24,7 +24,7 @@
 #ifndef HAVE_ILBC_CPP
 extern "C" {
 #endif
-#include <ilbc/iLBC_encode.h>
+#include <ilbc.h>
 #ifndef HAVE_ILBC_CPP
 }
 #endif
--- twinkle-1.4.2/src/audio/audio_decoder.cpp~	2009-01-18 14:38:00.000000000 +0100
+++ twinkle-1.4.2/src/audio/audio_decoder.cpp	2012-11-25 13:39:48.622799700 +0100
@@ -25,7 +25,7 @@
 #ifndef HAVE_ILBC_CPP
 extern "C" {
 #endif
-#include <ilbc/iLBC_decode.h>
+#include <ilbc.h>
 #ifndef HAVE_ILBC_CPP
 }
 #endif